Added severity to ntopng checks table

scripts/lua/modules/check_definitions/network/ip_reassignment.lua

@@ -5,6 +5,7 @@ local dirs = ntop.getDirs()
 package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
 
 local checks = require("checks")
+local alert_consts = require "alert_consts"
 
 -- #################################################################
 
@@ -19,6 +20,7 @@ end
 local script = {
    -- Script category
    category = checks.check_categories.network,
+   severity = alert_consts.get_printable_severities().warning,
 
    -- Off by default
    default_enabled = false,